the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur
双语例句
用作名词 (n.)
The vagina receives the penis during coitus. 阴道在性交过程中容纳阴茎。
Reaching orgasm long after the beginning of coitus is a common male dysfunction. 性交长久以后才达到性高潮是男性常见的性功能障碍。
